4ASV

Solution structure of the N-terminal dimerisation domain of Sgt2


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the Sgt2/Get5 Complex Provides Insights Into Get-Mediated Targeting of Tail-Anchored Membrane Proteins

Simon, A.C.Simpson, P.J.Goldstone, R.M.Krysztofinska, E.M.Murray, J.W.High, S.Isaacson, R.L.

(2013) Proc Natl Acad Sci U S A 110: 1327

  • DOI: 10.1073/pnas.1207518110
  • Primary Citation of Related Structures:  
    4A20, 4ASV, 4ASW

  • PubMed Abstract: 
  • Small, glutamine-rich, tetratricopeptide repeat protein 2 (Sgt2) is the first known port of call for many newly synthesized tail-anchored (TA) proteins released from the ribosome and destined for the GET (Guided Entry of TA proteins) pathway. This leads them to the residential membrane of the endoplasmic reticulum via an alternative to the cotranslational, signal recognition particle-dependent mechanism that their topology denies them ...

    Small, glutamine-rich, tetratricopeptide repeat protein 2 (Sgt2) is the first known port of call for many newly synthesized tail-anchored (TA) proteins released from the ribosome and destined for the GET (Guided Entry of TA proteins) pathway. This leads them to the residential membrane of the endoplasmic reticulum via an alternative to the cotranslational, signal recognition particle-dependent mechanism that their topology denies them. In yeast, the first stage of the GET pathway involves Sgt2 passing TA proteins on to the Get4/Get5 complex through a direct interaction between the N-terminal (NT) domain of Sgt2 and the ubiquitin-like (UBL) domain of Get5. Here we characterize this interaction at a molecular level by solving both a solution structure of Sgt2_NT, which adopts a unique helical fold, and a crystal structure of the Get5_UBL. Furthermore, using reciprocal chemical shift perturbation data and experimental restraints, we solve a structure of the Sgt2_NT/Get5_UBL complex, validate it via site-directed mutagenesis, and empirically determine its stoichiometry using relaxation experiments and isothermal titration calorimetry. Taken together, these data provide detailed structural information about the interaction between two key players in the coordinated delivery of TA protein substrates into the GET pathway.


    Organizational Affiliation

    Division of Molecular Biosciences, Imperial College London, London SW7 2AZ, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SMALL GLUTAMINE-RICH TETRATRICOPEPTIDE REPEAT-CONTAINING PROTEIN 2A, B92Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for Q12118 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12118 
Go to UniProtKB:  Q12118
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY 
  • OLDERADO: 4ASV Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-01-16
    Type: Initial release
  • Version 1.1: 2013-01-30
    Changes: Database references
  • Version 1.2: 2013-03-06
    Changes: Database references